Look at this
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Race Director
Joined: Dec 1999
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Look at this
this is the kind of crap people sell for 2750 Euros (don't know the current going rate but that's over 3200$ for sure) as being a performance rebuild...apart from the bubba job (paint resto and obviously eveything's been sandblasted...coming back yo haunt you), the cheap parts and general cheap and crummy look of things...there's something terribly wrong..who sees it? 
http://www.speurders.nl/show_photo.p..._photo_count=3
http://www.speurders.nl/show_photo.p..._photo_count=3
Last edited by Twin_Turbo; Dec 13, 2005 at 01:52 PM.
Thread Starter
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not all pistons are different for each side, some w/ 2 the same reliefs can be used on both sides (like the L82 piston) making sure the valve relief is on the intake side and for the 4 valve relief pistons they can be used in both pos. on each cyl. but keep the mark pointing to the front of the engine. if the reliefs are the same size, it depends on the type of piston.
What would happen? the valve would smack the piston.
What would happen? the valve would smack the piston.
Last edited by Twin_Turbo; Dec 13, 2005 at 02:11 PM.
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From: Cary North Carolina
I think that re-classifies that engine as a no performance engine.
With that kind of an amature job I believe I would have to suspect everything else in that engine.
I have another question. It appears that the matting sufaces at the water pump and the exhaust manifold were painted as well as inside the exhaust ports. Is that a bad thing too?
With that kind of an amature job I believe I would have to suspect everything else in that engine.
I have another question. It appears that the matting sufaces at the water pump and the exhaust manifold were painted as well as inside the exhaust ports. Is that a bad thing too?
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Thread Starter
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Well apart from it looking half assed it's not anything that will cause problems, the paint in the exhaust ports will burn off on startup, the paint on the wp and exhaust flange won't impede gasket sealing.
Melting Slicks
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From: pr, frederick md.
Originally Posted by Twin_Turbo
not all pistons are different for each side, some w/ 2 the same reliefs can be used on both sides (like the L82 piston) making sure the valve relief is on the intake side and for the 4 valve relief pistons they can be used in both pos. on each cyl. but keep the mark pointing to the front of the engine. if the reliefs are the same size, it depends on the type of piston.
What would happen? the valve would smack the piston.
What would happen? the valve would smack the piston.
Thread Starter
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yes I know, that's why the some w/ the 4 valve relieds have the notch/mark, otherwise there would be no telling which way they had to go in on the bank you are installing it on, the ones w/ 2 valve reliefs or 1 big one don't need it because you can't have it upside down (unlike the guy who built the engine above)
However, the pistons w/ 4 valve reliefs or the ones w/ 2 symmetrical or 1 large valve relief (like the L82 piston) and no marking/notch can be installed in all bores in either positions and are not designed for a light and heavy thrust face...that's what it's for, the trust face.
So simple rule,
4 reliefs no marking -> anywhere
2 symmetrical reliefs or one big symmetrical one and no marking -> anywhere as long as the relief is on the manifold side
2 asymmetrical or 1 large asymmetrical, then you have large relief left: 2,3,6&7 and large relief on the right go to 1,4,5&8 with the relief on the manifold side and they should not be mixed.
BTW, the thrust side is also the reason for the 180degree difference in ring gap spacing between 1,3,5,7 and 2,4,6,8 .
However, the pistons w/ 4 valve reliefs or the ones w/ 2 symmetrical or 1 large valve relief (like the L82 piston) and no marking/notch can be installed in all bores in either positions and are not designed for a light and heavy thrust face...that's what it's for, the trust face.
So simple rule,
4 reliefs no marking -> anywhere
2 symmetrical reliefs or one big symmetrical one and no marking -> anywhere as long as the relief is on the manifold side
2 asymmetrical or 1 large asymmetrical, then you have large relief left: 2,3,6&7 and large relief on the right go to 1,4,5&8 with the relief on the manifold side and they should not be mixed.
BTW, the thrust side is also the reason for the 180degree difference in ring gap spacing between 1,3,5,7 and 2,4,6,8 .
Last edited by Twin_Turbo; Dec 13, 2005 at 04:30 PM.
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Originally Posted by redc3
you do know that the arrow tells you which way the piston goes because of rod offset right? the hole in the piston is offset from center. if you turn it around you will lose some clearance inside the block and with certain valve reliefs. but i know alot of old timers that swear turning them around changes the angle of the rod, pushing on the crank, thus creating more torque. i also remember a problem chevy had in the early 90's that had something to do with this. ??